======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '213'
                                          'artist'  'Felix Kubin'
                                     'text_people'  ''
                                         'release'  'nanoloop 1.0'
                                           'title'  'Ich träume...'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['electronica', 'avant garde', 'electro', 'electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '123.9'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     'nanoloop 1.0'
'TBPM' (BPM (beats per minute))                     '123.9'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TIT2' (Title/songname/content description)         'Ich träume...'
'TKEY' (Initial key)                                '5A'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Felix Kubin'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['electronica', 'avant garde', 'electro', 'electronic', 'experimental']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.35 dB'
'TXXX:replaygain_track_peak'                        '0.641868'

========================== row from database ==========================
                                              'id'  1286781
                                            'path'  /data/Music/Bulk/00poprockelectronic/Felix Kubin/felix kubin - Ich tr_ume....mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  213
                                           'genre'  electronic-experimental
                                        'filesize'  4272000
                                           'mtime'  1636917462
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic felix kubin tr_ume... electronic experimental
                                      'tag_artist'  Felix Kubin
                                     'tag_release'  nanoloop 1.0
                                       'tag_title'  Ich träume...
                                             'bpm'  123.9
                                    'search_title'  'ich':1 'traume':2,3,4,5
                                   'search_artist'  'felix':1 'kubin':2
                                  'search_release'  '0':3 '1':2 '10':4 'nanoloop':1
                                     'search_rest'  '00poprockelectronic':1 'electronic':8 'experimental':9 'felix':2 'kubin':3 'tr':4,6 'ume':5,7
                                    'search_combo'  '0':10C '00poprockelectronic':12 '1':9C '10':11C 'electronic':19 'experimental':20 'felix':6B,13 'ich':1A 'kubin':7B,14 'nanoloop':8C 'tr':15,17 'traume':2A,3A,4A,5A 'ume':16,18
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'avant garde', 'electro', 'electronic', 'experimental']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636917462.2337594  (2021-11-14 20:17:42)
                             'size'  4272000